Chair-abjye structure



E BERNINGHAUS. CHAIR ARM STRUCTURE,"

APPLICATION FILED JUNE 10. 19:8.

1 ,326, 1 65 Patented Dec. 30, 1919.

UNITED sra rn FAT NT OFFIC- EUGENE BERNINGEAUS, or CINCINNATI, omo.

To all whom it may concern:

Be it known that I, JEUGELNE. BERNING- runs, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Chair-Arm Structures, of which the following is a specification. q 7

My invention relates to improved arm structure for'dental, surgical, and barber chairs. One of its objects is to provide an improved arm capable of being enameled, protected and kept in aseptic condition. Another object is to provide an arm structure of strength combined with relatively light weight and adapted to be enameled by dipping. Another object is to provide an arm structure adapted to be economically produced from sheet metal and subsequently enameled. Another object is to provide an arm structure of sheet metal combined with improved means to mount the same in position. ,My invention also combines certain details of form, combination and arrangement, all of which will be fully set forth in the description of the accompanying drawings, in which:

Figure 1 is a perspective view of one modification of my improved arm.

Fig. 21s a perspective view of another modification.

Fig. 3 is a sectional view on line 3 3 of Fig. 2.

Fig. 4 is an enlarged transverse section on line 4 4 of Fig. 2.

Fig. 5 is an enlarged perspective view of one of the mounting brackets detached.

The accompanying drawings illustrate the preferred embodiments of my invention, in Figs. 2 to 5 of which A represents the top section of a sheet metal chair arm, and B the section thereof constituting the sides thereof. The sections A are stamped by right hand and left hand dies from sheet metal into cut-shape with flanged edges and the center of plain or ornamental design as desired. The edges of section A are then turned inwardly to form a lock seam withsimilar edges on the section B. The section B is shaped from a long strip of sheet metal of the desired width, preferably by rolling, so as to form a bead 6 with an inturned edge 7 at the lower edge. The upper edge of the section B is turned outwardly and downwardly to form a lock sea-1n 8 when engaged I Specification of Letters Patent.

Patented Dec. 30, 1919.

Application filed June 10, 1918. Serial No. 239,241.

withthe correspondingly turned edge of section A. The ends of section B are united at 9 by autogenous or electric welding to form a loop of the section B after it has been lock-seamed to the section A.

Brackets D of sheet metal are provided with stud bolts 10, preferably electrically welded to said brackets, and said brackets, after being inserted in position are preferably permanently attached to the section B at 11 by spot-welding or similar method. The brackets D render the arm structure more rigid and provide for conveniently and rigidly attaching or mounting the arms upon a'chair.

The metal arm structure is then cleaned if necessary and enameled, which due to the nature of the structure may be effected by dipping. The enameling material flows into the lock seam so as to close the joint and produce a smooth beaded effect, while the bead 6 with its inturned edge increases the rigidity of the lower portion of section B and provides for a smooth termination of the enamel coating without rough edges or sharp points of enamel, and also avoids sharp edges liable to cause injury in handling or moving the chair.

The stud-bolts 10 and nuts 12 serve to bolt wooden sections E to the brackets D in position to close the opening at the under face of the arms, and provide for securing the arms by means of Wood screws to the chair frame.

The'structure herein illustrated and described is capable of considerable modification without departing from the principle of my invention.

Having described my invention, what I claim is:

1. An arm structure comprising a sheet metal top member and a loop shaped sheet metal apron member seamed together, said apron member being open at the bottom and provided at its lower edge with a bead having an inwardly turned edge, and means within the apron to attach the arm to a chair frame.

2. An arm structure comprising a sheet metal top member, a loop shaped sheet metal apron member, said top member and apron member being united by a seam joint which when enameled forms a smooth bead encircling the top of the arm, and said apron member being provided at its lower end with a bead having an inwardly turned lower edge, and means within said arm to attach the arm to a chair frame.

3. An arm structure comprising a sheet metal top member, a loop-shaped sheet metal apron member, sheet metal crossbraces uniting opposite sides of said apron member, and a bottom member attached to said braces and closing the lower end of said apron.

4. An enameled arm structure comprising a sheet metal top section, and a loop shaped sheet metal apron section, said top section and apron section being seamed together to form a bead encircling the top section, and 15 means closing the lower end of said apron and serving to attach said arm to a chair frame.

In testimony whereof I aflix my signature in the presence of two witnesses.

EUGENE BERNINGHAUS. Witnesses:

O. W. MILES, W. THORNTON Boenm. 

